阅读说明：本技术 辅助门把手组件及制冷设备 (Auxiliary door handle assembly and refrigeration equipment ) 是由 王利鑫 李林杰 朱昆 于 2019-03-18 设计创作，主要内容包括：本发明公开了一种辅助门把手组件及制冷设备,包括把手、锁钩、连杆组件及转轴组件,连杆组件随把手的运动与箱体抵靠或分离,锁钩的第二端随连杆组件的运动与箱体上的卡接部卡接或分离,从而实现门体与箱体之间的锁紧或开合。本发明通过连杆组件和转轴组件将门体撞击箱体的反作用力转换为关门锁钩的锁紧力,实现锁钩与卡接部的锁紧和分离。机械结构简单、可靠性高、成本低、且便于维修。该结构不占用门体的发泡层,不仅不影响产品的外在美观性,还不会影响门体的保温性能。(The invention discloses an auxiliary door handle assembly and refrigeration equipment, which comprise a handle, a lock hook, a connecting rod assembly and a rotating shaft assembly, wherein the connecting rod assembly is abutted against or separated from a box body along with the movement of the handle, and the second end of the lock hook is clamped with or separated from a clamping part on the box body along with the movement of the connecting rod assembly, so that the locking or opening and closing between a door body and the box body are realized. According to the door closing device, the counterforce of the door body impacting the box body is converted into the locking force of the door closing latch hook through the connecting rod assembly and the rotating shaft assembly, so that the latch hook and the clamping part are locked and separated. The mechanical structure is simple, the reliability is high, the cost is low, and the maintenance is convenient. The structure does not occupy a foaming layer of the door body, not only does not influence the external aesthetic property of the product, but also does not influence the heat insulation performance of the door body.)

1. An auxiliary door handle assembly is characterized by comprising a handle, a lock hook, a connecting rod assembly and a rotating shaft assembly;

the one end of handle is passed through the pivot subassembly is rotated with the one end of the door body of refrigeration plant and is connected, the latch hook passes through the pivot subassembly with the one end of the door body is rotated and is connected, link assembly's first end is passed through the pivot subassembly with the handle is rotated and is connected, link assembly's second end is passed through the pivot subassembly with the first end of latch hook is rotated and is connected, link assembly's third end is passed through the pivot subassembly with the door body is rotated and is connected, link assembly follows the motion of handle supports with refrigeration plant's box and leans on or the separation, the one end of box be equipped with be used for with the joint portion of the second end joint of latch hook, the second end of latch hook follows link assembly's motion with joint portion joint or separation.

2. The auxiliary door handle assembly according to claim 1,

the connecting rod assembly comprises a first connecting rod, a second connecting rod and a third connecting rod;

the rotating shaft assembly comprises a first rotating shaft, a second rotating shaft, a third rotating shaft, a fourth rotating shaft, a fifth rotating shaft and a sixth rotating shaft;

one end of the handle is rotatably connected with one end of the door body through the first rotating shaft, the lock hook is rotatably connected with one end of the door body through the fourth rotating shaft, and the first end of the third connecting rod is rotatably connected with one end of the door body through the sixth rotating shaft;

the first end of the first connecting rod is rotatably connected with one end of the handle through the second rotating shaft, the second end of the third connecting rod is rotatably connected with the first end of the second connecting rod through the fifth rotating shaft, and the second end of the first connecting rod, the second end of the second connecting rod and the first end of the lock hook are rotatably connected through the third rotating shaft;

the door body with when the box is in the state of opening and shutting, the second end of latch hook with joint portion separates, the door body with when the box is changed to locking state by the state of opening and shutting, the orientation that is close to the box promotes the handle extremely the first end of second connecting rod the second end of third connecting rod with the box supports and leans on, continues to promote the handle, fifth pivot orientation is close to door body side motion, first connecting rod the second connecting rod all is close to latch hook side motion, the second end orientation of latch hook be close to the direction motion of joint portion extremely with joint portion joint.

3. The auxiliary door handle assembly according to claim 2, wherein the latch hook, the link assembly and the rotation shaft assembly are respectively provided at both ends of the door body, and the engaging portion is respectively provided at both ends of the case body.

4. The auxiliary door handle assembly as claimed in claim 3, wherein the door body is provided at both ends thereof with respective enclosures, both ends of the handle are rotatably connected to the enclosures via the first rotating shaft, the first end of the third link is rotatably connected to the enclosures via the sixth rotating shaft, and the latch hook is rotatably connected to the enclosures via the fourth rotating shaft.

5. The auxiliary door handle assembly according to claim 4, wherein a latch hook box is provided at each of both ends of the case, a first opening into which a second end of the latch hook extends is provided on the latch hook box, and the engaging portion is provided on the first opening side.

6. The auxiliary door handle assembly of claim 5, wherein the second end of the third link and the first end of the second link respectively abut against the latch hook box, the latch hook being retained by a side wall of the enclosure, the first link being retained by the first pivot.

7. The auxiliary door handle assembly of claim 5, wherein the first, second and third links are located within the package box when the door body and the cabinet are in the locked state.

8. The auxiliary door handle assembly of any one of claims 4-7, wherein the handle includes a hand-held portion and connecting portions provided at both ends of the hand-held portion, the connecting portions being rotatably connected to the enclosure by the first rotating shaft.

9. The auxiliary door handle assembly of claim 8, wherein a direction of the force acting on the hand grip is not parallel to a direction of movement of the door body.

10. A refrigerator comprising a cabinet and a door body hingedly connected to the cabinet, further comprising an auxiliary door handle assembly as claimed in any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of refrigeration equipment, in particular to an auxiliary door handle assembly and refrigeration equipment.

Background

The handle of the existing vertical refrigerator basically only plays a role in grasping and has no locking function. If the locking function is to be realized, the prior art generally adopts the following three ways:

1. the electromagnetic lock is added, and the disadvantages of the mode are that: to increase the power consumption of the whole machine and increase the complexity of electric control, the electric signal is required to unlock before opening the door;

2. the disadvantage of using a universal link handle on the cold storage door is that: if the handle is arranged inside the door, a large foaming layer space is occupied from top to bottom, the heat preservation effect of the whole refrigerator is affected, the maintenance is troublesome, if the handle is arranged outside the door, the appearance of the whole refrigerator is seriously affected, and the size and the packaging size of the whole refrigerator are correspondingly increased, so that the refrigerator is unacceptable for household or medical use;

3. the single handle with a mechanical screwing structure arranged on the side surface of the box body is used, and the method has the following defects: the door closing locking point is generally arranged at one point in the middle of the door body, if the door body is longer, the upper end and the lower end of the door body are easy to deform to cause poor sealing, and the double-door box body is directly installed without space.

Disclosure of Invention

In order to solve the technical problems, the invention provides an auxiliary door handle assembly and a refrigeration device, which can convert the reaction force of a door body impacting a box body into the locking force of a door closing latch hook to lock the door body and the box body while considering both the appearance and the heat preservation performance of the refrigeration device.

The invention provides a technical scheme that an auxiliary door handle assembly comprises a handle, a latch hook, a connecting rod assembly and a rotating shaft assembly;

the one end of handle is passed through the pivot subassembly is rotated with the one end of the door body of refrigeration plant and is connected, the latch hook passes through the pivot subassembly with the one end of the door body is rotated and is connected, link assembly's first end is passed through the pivot subassembly with the handle is rotated and is connected, link assembly's second end is passed through the pivot subassembly with the first end of latch hook is rotated and is connected, link assembly's third end is passed through the pivot subassembly with the door body is rotated and is connected, link assembly follows the motion of handle supports with refrigeration plant's box and leans on or the separation, the one end of box be equipped with be used for with the joint portion of the second end joint of latch hook, the second end of latch hook follows link assembly's motion with joint portion joint or separation.

Further, the connecting rod assembly comprises a first connecting rod, a second connecting rod and a third connecting rod; the rotating shaft assembly comprises a first rotating shaft, a second rotating shaft, a third rotating shaft, a fourth rotating shaft, a fifth rotating shaft and a sixth rotating shaft; one end of the handle is rotatably connected with one end of the door body through the first rotating shaft, the lock hook is rotatably connected with one end of the door body through the fourth rotating shaft, and the first end of the third connecting rod is rotatably connected with one end of the door body through the sixth rotating shaft; the first end of the first connecting rod is rotatably connected with one end of the handle through the second rotating shaft, the second end of the third connecting rod is rotatably connected with the first end of the second connecting rod through the fifth rotating shaft, and the second end of the first connecting rod, the second end of the second connecting rod and the first end of the lock hook are rotatably connected through the third rotating shaft; the door body with when the box is in the state of opening and shutting, the second end of latch hook with joint portion separates, the door body with when the box is changed to locking state by the state of opening and shutting, the orientation that is close to the box promotes the handle extremely the first end of second connecting rod the second end of third connecting rod with the box supports and leans on, continues to promote the handle, fifth pivot orientation is close to door body side motion, first connecting rod the second connecting rod all is close to latch hook side motion, the second end orientation of latch hook be close to the direction motion of joint portion extremely with joint portion joint.

Furthermore, the two ends of the door body are respectively provided with the lock hook, the connecting rod assembly and the rotating shaft assembly, and the two ends of the box body are respectively provided with the clamping parts.

Furthermore, two ends of the door body are respectively provided with a packaging box, two ends of the handle are respectively connected with the packaging box in a rotating mode through the first rotating shaft, the first end of the third connecting rod is connected with the packaging box in a rotating mode through the sixth rotating shaft, and the lock hook is connected with the packaging box in a rotating mode through the fourth rotating shaft.

Furthermore, the two ends of the box body are respectively provided with a lock hook box, the lock hook box is provided with a first opening for the second end of the lock hook to extend into, and the first opening side is provided with the clamping portion.

Furthermore, the second end of the third connecting rod and the first end of the second connecting rod are respectively abutted against the lock hook box, the lock hook is limited by the side wall of the packaging box, and the first connecting rod is limited by the first rotating shaft.

Further, when the door body and the box body are in a locked state, the first connecting rod, the second connecting rod and the third connecting rod are all located in the packaging box.

Further, the handle includes handheld portion and locates the connecting portion at the both ends of handheld portion, connecting portion pass through first pivot with the encapsulation box rotates and is connected.

Further, the direction of the acting force acting on the handheld part is not parallel to the moving direction of the door body.

The invention also provides refrigeration equipment which comprises a box body, a door body hinged with the box body and the auxiliary door handle assembly.

Compared with the prior art, the invention has the advantages and positive effects that:

the invention provides an auxiliary door handle assembly and refrigeration equipment, which comprise a handle, a lock hook, a connecting rod assembly and a rotating shaft assembly, wherein the connecting rod assembly is abutted against or separated from a box body along with the movement of the handle, and the second end of the lock hook is clamped with or separated from a clamping part on the box body along with the movement of the connecting rod assembly, so that the locking or opening and closing between a door body and the box body are realized. According to the door closing device, the counterforce of the door body impacting the box body is converted into the locking force of the door closing latch hook through the connecting rod assembly and the rotating shaft assembly, so that the latch hook and the clamping part are locked and separated. The mechanical structure is simple, the reliability is high, the cost is low, and the maintenance is convenient. The structure does not occupy a foaming layer of the door body, not only does not influence the external aesthetic property of the product, but also does not influence the heat insulation performance of the door body.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a first schematic view of an auxiliary door handle assembly according to an embodiment of the present invention;

FIG. 2 is a second schematic structural view of an auxiliary door handle assembly according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an auxiliary door handle assembly when the door body and the box body are in an open-close state according to the embodiment of the invention;

FIG. 4 is a schematic structural diagram of an auxiliary door handle assembly when the door body and the cabinet body are in a locked state according to the embodiment of the invention;

FIG. 5 is a diagram illustrating the force direction analysis of the components of the auxiliary door handle assembly when the door is closed according to the embodiment of the present invention.

The locking mechanism comprises a first connecting rod, a second connecting rod, a third connecting rod, a first rotating shaft, a second rotating shaft, a third rotating shaft, a fourth rotating shaft, a fifth rotating shaft, a 09-sixth rotating shaft, a handle, a handheld part, a connecting part, a packaging box, a 12-locking hook box, a first opening, a clamping part, a 123-abutting part, a 13-locking hook, a 14-door body and a box body, wherein the first connecting rod, the 02-second connecting rod, the 03-third connecting rod, the 04-first rotating shaft.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention discloses an auxiliary door handle assembly which is applied to refrigeration equipment such as a refrigerator and a freezer. The refrigeration equipment comprises a door body 14 and a box body 15 hinged with the door body 14, the auxiliary door handle assembly is arranged on one side far away from the hinged position of the door body 14 and the box body 15, and referring to fig. 3 and 4, when the door body 14 and the box body 15 are closed, the auxiliary door handle assembly is used for locking the door body 14 and the box body 15; when the door body 14 is opened and closed with the box body 15, the auxiliary door handle assembly can also be helpful for jacking the door body 14 to play a role in assisting power. In order to enable the two ends of the door body 14 to be stressed uniformly, lock reliably and improve the sealing performance of the door body 14, the two ends of the door body 14 are respectively provided with the auxiliary door handle assembly. This supplementary door handle subassembly can locate the upper and lower both ends of a body 14 along the direction of height of a body 14, also can locate both ends about a body 14 along the width direction of a body 14, and the commonality is strong, is favorable to the modular production and the standardized assembly of product. In this embodiment, the auxiliary door handle assembly is disposed at the upper and lower ends of the door body 14 along the height direction of the door body.

The auxiliary door handle assembly includes a handle 10, a latch hook 13, a link assembly and a rotary shaft assembly. The handle 10 comprises a handheld portion 101 and a connecting portion 102, the handheld portion 101 is vertically arranged along the height direction of the door body 14, the connecting portion 102 is arranged at two ends of the handheld portion 101 and is perpendicular to the handheld portion 101, the handheld portion 101 is used for a user to apply force, and the connecting portion 102 is used for being connected with the door body 14 and the connecting rod assembly. The free end of the connecting part 102 is rotatably connected with the end face of the door body 14 through a rotating shaft assembly, and the lock hook 13 is rotatably connected with the end face of the door body 14 through a rotating shaft assembly. The second end of the latch hook 13 is used for being latched with a latch portion 122 on the box body 15, so as to lock the door body 14 and the box body 15. The first end of the latch hook 13 and the connecting portion 102 are indirectly connected through a link assembly, specifically, the first end of the link assembly (hereinafter, the first end of the first link 01) is rotatably connected to the free end portion of the connecting portion 102 through a rotating shaft assembly, the second end of the link assembly (hereinafter, the second end of the first link 01, the second end of the second link 02) is rotatably connected to the first end of the latch hook 13 through a rotating shaft assembly, and the third end of the link assembly (hereinafter, the first end of the third link 03) is rotatably connected to the end surface of the door body 14 through a rotating shaft assembly. A user applies force on the handheld portion 101, the acting force is transmitted to the connecting rod assembly through the connecting portion 102, the connecting rod assembly transmits the acting force to the locking hook 13, the second end of the locking hook 13 is clamped or separated with the clamping portion 122 on the box body 15, and when the second end of the locking hook 13 is clamped with the clamping portion 122, the door body 14 is locked with the box body 15; when the second end of the latch hook 13 is separated from the clamping portion 122, the door 14 and the box 15 are opened and closed. During specific actions, the connecting rod assembly can abut against or separate from the box body 15 along with the movement of the handle 10, when the door is closed, the connecting rod assembly abuts against the box body 15 under the action of the handle 10 to continuously push the handle 10, and the locking hook 13 rotates under the action of the connecting rod assembly until the second end of the locking hook 13 is clamped with the clamping part 122; when the door is opened, the connecting rod assembly is separated from the box body 15 under the action of the handle 10, and the locking hook 13 rotates reversely under the action of the connecting rod assembly until the second end of the locking hook 13 is separated from the clamping portion 122.

Referring to fig. 3 and 4, the link assembly includes a first link 01, a second link 02, and a third link 03, and the rotation shaft assembly includes a first rotation shaft 04, a second rotation shaft 05, a third rotation shaft 06, a fourth rotation shaft 07, a fifth rotation shaft 08, and a sixth rotation shaft 09. The first link 01 is provided between the connection portion 102 and the latch hook 13, and the second link 02 is provided between the first link 01 and the third link 03. The first rotating shaft 04, the fourth rotating shaft 07 and the sixth rotating shaft 09 are fixedly connected with the end surface of the door body 14, the third rotating shaft 06 and the fifth rotating shaft 08 are movable shafts, and the second rotating shaft 05 is used for rotatably connecting the handheld portion 101 with the first end of the first connecting rod 01. Specifically, the free end of the connecting part 102 is rotationally connected with the end face of the door body 14 through a first rotating shaft 04, the locking hook 13 is rotationally connected with the end face of the door body 14 through a fourth rotating shaft 07, and the first end of the third connecting rod 03 is rotationally connected with the end face of the door body 14 through a sixth rotating shaft 09; for the linkage part of the link assembly, the first end of the first link 01 is rotatably connected with the free end of the connecting part 102 through the second rotating shaft 05, the second end of the first link 01, the second end of the second link 02 and the first end of the locking hook 13 are rotatably connected through the third rotating shaft 06, and the second end of the third link 03 and the first end of the second link 02 are rotatably connected through the fifth rotating shaft 08.

Referring to fig. 5, an included angle between the second link 02 and the third link 03 is denoted as a, and a distance between the fifth rotating shaft 08 and the first link 01 is denoted as L. When the door body 14 and the box body 15 are in an opening and closing state, the second end of the lock hook 13 is separated from the clamping portion 122, an included angle between the second connecting rod 02 and the third connecting rod 03 is marked as a1, and a distance between the fifth rotating shaft 08 and the first connecting rod is marked as L1; when the door body 14 and the box body 15 are in a locked state, the second end of the lock hook 13 is clamped with the clamping portion 122, an included angle between the second connecting rod 02 and the third connecting rod 03 is marked as a2, and a distance between the fifth rotating shaft 08 and the first connecting rod 01 is marked as L2. In both states, A1 < A2, L1 > L2.

When the door is closed, that is, when the door 14 and the box body 15 are switched from the open-close state to the lock-close state, the hand-held portion 101 is pushed towards the direction close to the box body 15, the door 14 moves towards the direction close to the box body 15, when the first end of the second connecting rod 02 and the second end of the third connecting rod 03 abut against the box body 15, that is, the position of the fifth rotating shaft 08 abuts against the box body 15, the hand-held portion 101 is continuously pushed, the position of the fifth rotating shaft 08 is stressed to push the second connecting rod 02 to move towards the outer side of the door 14, meanwhile, the first connecting rod 01 is pushed by the second rotating shaft 05 to move towards the direction close to the latch hook 13, at this time, the included angle between the second connecting rod 02 and the third connecting rod 03 gradually increases, the distance L between the fifth rotating shaft 08 and the first connecting rod 01 gradually decreases, the first end of the latch hook 13 rotates counterclockwise around the fourth rotating shaft 07 under the pushing of the first connecting rod 01 and the second connecting rod 02, and drives, until the second end of the latch hook 13 is latched with the latch portion 122, the closing of the door is completed. The analysis of the moving directions of the first link 01, the second link 02 and the latch hook 13 refers to fig. 5.

When the door is opened, that is, when the door 14 and the box body 15 are switched from the locking state to the opening/closing state, the door opening process is the reverse process of the door closing process, specifically, the hand-held portion 101 is pulled in the direction away from the box body 15, the door 14 moves in the direction away from the box body 15, the first connecting rod 01 moves in the direction away from the locking hook 13 under the pushing of the second rotating shaft 05, the third connecting rod 03 moves in the direction close to the box body 15 under the action of the sixth rotating shaft 09, the second connecting rod 02 moves in the direction away from the locking hook 13 under the driving of the third connecting rod 03, at this time, the included angle between the second connecting rod 02 and the third connecting rod 03 is gradually reduced, the distance L between the fifth rotating shaft 08 and the first connecting rod 01 is gradually increased, the first end of the locking hook 13 rotates clockwise under the combined action of the first connecting rod 01 and the second connecting rod 02, the second end of the locking hook 13 is driven to move in the direction away from the locking portion 122, when the position of the fifth rotating shaft 08 abuts against the box body 15, the handheld portion 101 is continuously pulled, and the abutting force at the position of the fifth rotating shaft 08 is converted into the ejection assisting force when the door body 14 opens, so that the door body 14 can be opened conveniently.

The second end of latch hook 13 sets up to have the kink (not marking) of bending towards the direction of joint portion 122, and kink department is equipped with the recess with joint portion 122 adaptation, realizes the joint of kink and joint portion 122. The fourth rotating shaft 07 is disposed between the first end of the locking hook 13 and the second end of the locking hook 13.

The invention fully utilizes the linkage action of the connecting rod assembly, converts the reaction force of the door body 14 impacting the box body 15 into the locking force of the door closing locking hook 13, and realizes the locking and the separation of the locking hook 13 and the clamping part 122. The mechanical connecting rod assembly is simple in structure, high in reliability, low in cost and convenient to maintain. The upper end and the lower end of the door body 14 and the upper end and the lower end of the box body 15 are respectively locked, so that the locking reliability is improved, the sealing performance of the door body 14 is improved, and the structure does not occupy a foaming layer of the door body 14, so that the external attractiveness of a product is not influenced, and the heat insulation performance of the door body 14 is not influenced.

The upper end and the lower end of the door body 14 are respectively provided with a packaging box 11, the free end of the connecting part 102 is respectively rotatably connected with the packaging box 11 through a first rotating shaft 04, the first end of the third connecting rod 03 is rotatably connected with the packaging box 11 through a sixth rotating shaft 09, and the lock hook 13 is rotatably connected with the packaging box 11 through a fourth rotating shaft 07. Referring to fig. 1 and 2, the enclosure 11 is a hollow box-shaped structure, and provides an installation space for the hand-held portion 101, the link assembly, and the rotating shaft assembly. An opening (not labeled) is formed in a surface of the enclosure 11 facing the front side of the door 14, and a free end of the connecting portion 102 extends into the enclosure 11 through the opening and is rotatably connected with the bottom of the enclosure 11 through the first rotating shaft 04. Therefore, when a user looks from the front side of the door body 14, only the handle 10 can be seen, and other parts cannot be seen, which is beneficial to improving the product aesthetic property. The side of the enclosure 11 facing the casing 15 is also provided with an opening (not indicated) for facilitating the abutment of the fifth shaft 08 with the casing 15. When the door body 14 and the box body 15 are in a locked state, the first connecting rod 01, the second connecting rod 02 and the third connecting rod 03 are all positioned in the packaging box 11, which is also beneficial to improving the product aesthetic property.

The upper end and the lower end of the box body 15 are respectively provided with a latch hook box 12, the latch hook box 12 is provided with a first opening 121 for the second end of the latch hook 13 to extend into, and the side of the first opening 121 is provided with a clamping part 122. The latch hook box 12 is further provided with an abutting portion 123 connected with the side surface of the box body 15, and when the position of the fifth rotating shaft 08 (i.e. the first end of the second connecting rod 02 and the second end of the third connecting rod 03) moves towards the direction close to the box body 15, the fifth rotating shaft directly abuts against the abutting portion 123, so that the box body is prevented from being worn when directly abutting against the side surface of the box body 05.

When the door is opened, the locking hook 13 rotates clockwise to abut against and limit the side wall of the packaging box 11, the first connecting rod 02 moves to abut against and limit the first rotating shaft 04, and at the moment, a user feels a stop feeling.

In this embodiment, referring to fig. 5, the direction of the acting force acting on the handheld portion 101 is not parallel to the moving direction of the door 14, which not only facilitates the operation of the user, but also facilitates the transmission of the acting force among the handle 10, the connecting rod assembly and the latch hook 13, and saves labor.

The invention also discloses refrigeration equipment, which comprises a box body 15, a door body 14 hinged with the box body 15 and the auxiliary door handle assembly disclosed by the embodiment.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.